Dual Nature of Radiation and Matter Test

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Dual Nature of Radiation and Matter Test - 5

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following event, support the quantum nature of light ?

A
Diffraction

B
Polarisation

C
Interference

D
Photoelectric effect
Question 2
4 / -1

The photons in a radiowave of wavelength 3 × 10⁴ cm have energy

A
6.62 × 10^-10 J

B
19.86 × 10^-24 J

C
6.62 × 10^-28 J

D
2.2 × 10^-35 J
Question 3
4 / -1

The average energy of the Planck oscillator is

A
hv

B

C

D
kT
Question 4
4 / -1

In photoelectric effect, if the intensity of light is doubled, then maximum kinetic energy of photoelectrons will become

A
double

B
half

C
four times

D
no change
Question 5
4 / -1

The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon

A
wavelength

B
frequency

C
intensity

D
work function
Question 6
4 / -1

When intensity of incident light increases

A
photo current increases

B
photo current decreases

C
kinetic energy of emitted photoelectrons increases

D
kinetic energy of emitted photoelectrons decreases
Question 7
4 / -1

In photoelectric effect, the electrons are ejected from metals if the incident light has a certain minimum

A
wavelength

B
frequency

C
amplitude

D
angle of incidence
Question 8
4 / -1

A light having wavelength 300 nm falls on a metal surface. Work function of metal is 2.54 eV. What is stopping potential ?

A
2.3 V

B
2.59 V

C
1.60 V

D
1.29 V
Question 9
4 / -1

The time taken by a photoelectron to come out after the photon strikes is approximately

A
10^-4 s

B
10^-10 s

C
10^-16 s

D
10^-1 s
Question 10
4 / -1

Light of frequency v falls on material of threshold frequency v₀ . Maximum kinetic energy of emitted electron is proportional to

A
v - v₀

B
v

C

D
v₀

Solution

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Dual Nature of Radiation and Matter Test - 5

Result

Dual Nature of Radiation and Matter Test - 5

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SHARING IS CARING

Question 1

Diffraction

Polarisation

Interference

Photoelectric effect

Question 2

6.62 × 10-10 J

19.86 × 10-24 J

6.62 × 10-28 J

2.2 × 10-35 J

Question 3

hv

kT

Question 4

double

half

four times

no change

Question 5

wavelength

frequency

intensity

work function

Question 6

photo current increases

photo current decreases

kinetic energy of emitted photoelectrons increases

kinetic energy of emitted photoelectrons decreases

Question 7

wavelength

frequency

amplitude

angle of incidence

Question 8

2.3 V

2.59 V

1.60 V

1.29 V

Question 9

10-4 s

10-10 s

10-16 s

10-1 s

Question 10

v - v0

v

v0

Solution

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Question Analysis

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6.62 × 10^-10 J

19.86 × 10^-24 J

6.62 × 10^-28 J

2.2 × 10^-35 J

10^-4 s

10^-10 s

10^-16 s

10^-1 s

v - v₀

v₀